Lexington Weather

Lexington, Massachusetts, USA

66°F

7/17/2026 2:01am

Lexington Conditions: Smoke, Clear
Temperature: 66.2°F / 19.0°C
Dew Point: 59.2°F
Relative Humidity: 78%
Wind: Calm, 10-min avg: Calm, gust: None
Barometer: 29.86 in Steady
Visibility: 10 miles
Rain Today: 0.00 in

Area Forecast Discussion
for Boston / Norton, MA

        
000
FXUS61 KBOX 112108
AFDBOX

Area Forecast Discussion
National Weather Service Boston/Norton MA
508 PM EDT Sat Jul 11 2026

.WHAT HAS CHANGED...
No changes to the forecast for this update cycle.

&&

.KEY MESSAGES...

- Dry conditions and comfortable summer temperatures continue 
  through the start of the work week.

- Heat and humidity return midweek with possible heat headlines
  Tuesday and Wednesday.

&&

.DISCUSSION...
KEY MESSAGE 1...Dry conditions and comfortable summer
temperatures continue through the start of the work week.

High pressure begins to build over the region and becomes centered 
over New England later today, bringing a seasonable airmass into 
place over the next several days. Temperatures in the low to mid 80s 
and dewpoints in the upper 50s to low 60s will continue through the 
start of the work week. The drier air mass will also keep rain 
chances to near zero before moisture returns later in the week.

KEY MESSAGE 2...Heat and humidity return midweek with possible 
heat headlines Tuesday and Wednesday.

Mid-level high pressure ridging will center over the Central 
U.S., stretching into the Mid Atlantic through much of next 
week, bringing mostly hot and dry weather across the Northeast. 
Hot temperatures in the low to mid 90s will return mid week with
some locations possibly nearing 100 Tuesday and Wednesday. We 
may need to consider a period of heat headlines with dew points 
rising into the mid to upper 60s, which will produce heat 
indices in the upper 90s for most of the interior portions of 
the forecast area each afternoon.

Rain chances through the period will remain low with high
pressure being in control. Models continue to show an amplifying 
upper-level trough toward the end of the week, which may bring
increasing rain chances and cooler temperatures if that trend
continues.

&&

.AVIATION /21Z SATURDAY THROUGH THURSDAY/...
Forecaster Confidence Levels...

Low - less than 30 percent. 
Moderate - 30 to 60 percent. 
High - greater than 60 percent.

Through Sunday: High Confidence.

VFR. Light winds 5-10 kts through the day. Seabreezes expected 
through 00-02z. Light NW winds overnight, with another seabreeze
Sunday as early as 12z.

KBOS Terminal...High Confidence. Added a brief period of light 
southwesterly winds late this evening before winds are expected 
to veer to the northwest overnight. A more southerly shift could
happen slightly earlier, but currently expect the brief period 
at around 02 to 04z.

KBDL Terminal...High Confidence.

Outlook /Sunday Night through Thursday/...

Monday through Monday Night: VFR. Breezy. 

Tuesday through Tuesday Night: VFR. Windy with local gusts up
to 30 kt. 

Wednesday through Thursday: VFR. Breezy.

&&

.MARINE...
Forecaster Confidence Levels...

Low - less than 30 percent. 
Moderate - 30 to 60 percent. 
High - greater than 60 percent.

Through Sunday...High confidence.

Mainly dry weather through next Wed as high pressure builds in.
Could see areas of SCA conditions by next Tuesday with 
increasing SW winds.

Outlook /Sunday Night through Thursday/...

Monday: Winds less than 25 kt. 

Monday Night: Low risk for Small Craft Advisory winds with
gusts up to 30 kt. Areas of seas approaching 5 ft. 

Tuesday: Moderate risk for Small Craft Advisory winds with
gusts up to 30 kt. Seas up to 5 ft. 

Tuesday Night: Moderate risk for Small Craft Advisory winds
with gusts up to 30 kt. Rough seas up to 9 ft. 

Wednesday: Moderate risk for Small Craft Advisory winds with
gusts up to 25 kt. Areas of rough seas. 

Wednesday Night: Winds less than 25 kt. Areas of seas
approaching 5 ft. Slight chance of rain showers. 

Thursday: Winds less than 25 kt. Areas of seas approaching
5 ft.

&&

.BOX WATCHES/WARNINGS/ADVISORIES...
CT...None.
MA...None.
RI...None.
MARINE...None.

&&

$$

DISCUSSION...McMinn/CB
AVIATION...McMinn/CB
MARINE...McMinn